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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 | /* * Architecture specific parts of the Floppy driver * * This file is subject to the terms and conditions of the GNU General Public * License. See the file "COPYING" in the main directory of this archive * for more details. * * Copyright (C) 1995 */ #ifndef __ASM_POWERPC_FLOPPY_H #define __ASM_POWERPC_FLOPPY_H #ifdef __KERNEL__ #include <asm/machdep.h> #define fd_inb(port) inb_p(port) #define fd_outb(value,port) outb_p(value,port) #define fd_enable_dma() enable_dma(FLOPPY_DMA) #define fd_disable_dma() fd_ops->_disable_dma(FLOPPY_DMA) #define fd_free_dma() fd_ops->_free_dma(FLOPPY_DMA) #define fd_clear_dma_ff() clear_dma_ff(FLOPPY_DMA) #define fd_set_dma_mode(mode) set_dma_mode(FLOPPY_DMA, mode) #define fd_set_dma_count(count) set_dma_count(FLOPPY_DMA, count) #define fd_get_dma_residue() fd_ops->_get_dma_residue(FLOPPY_DMA) #define fd_enable_irq() enable_irq(FLOPPY_IRQ) #define fd_disable_irq() disable_irq(FLOPPY_IRQ) #define fd_cacheflush(addr,size) /* nothing */ #define fd_free_irq() free_irq(FLOPPY_IRQ, NULL); #include <linux/pci.h> #include <asm/ppc-pci.h> /* for isa_bridge_pcidev */ #define fd_dma_setup(addr,size,mode,io) fd_ops->_dma_setup(addr,size,mode,io) static int fd_request_dma(void); struct fd_dma_ops { void (*_disable_dma)(unsigned int dmanr); void (*_free_dma)(unsigned int dmanr); int (*_get_dma_residue)(unsigned int dummy); int (*_dma_setup)(char *addr, unsigned long size, int mode, int io); }; static int virtual_dma_count; static int virtual_dma_residue; static char *virtual_dma_addr; static int virtual_dma_mode; static int doing_vdma; static struct fd_dma_ops *fd_ops; static irqreturn_t floppy_hardint(int irq, void *dev_id) { unsigned char st; int lcount; char *lptr; if (!doing_vdma) return floppy_interrupt(irq, dev_id); st = 1; for (lcount=virtual_dma_count, lptr=virtual_dma_addr; lcount; lcount--, lptr++) { st=inb(virtual_dma_port+4) & 0xa0 ; if (st != 0xa0) break; if (virtual_dma_mode) outb_p(*lptr, virtual_dma_port+5); else *lptr = inb_p(virtual_dma_port+5); } virtual_dma_count = lcount; virtual_dma_addr = lptr; st = inb(virtual_dma_port+4); if (st == 0x20) return IRQ_HANDLED; if (!(st & 0x20)) { virtual_dma_residue += virtual_dma_count; virtual_dma_count=0; doing_vdma = 0; floppy_interrupt(irq, dev_id); return IRQ_HANDLED; } return IRQ_HANDLED; } static void vdma_disable_dma(unsigned int dummy) { doing_vdma = 0; virtual_dma_residue += virtual_dma_count; virtual_dma_count=0; } static void vdma_nop(unsigned int dummy) { } static int vdma_get_dma_residue(unsigned int dummy) { return virtual_dma_count + virtual_dma_residue; } static int fd_request_irq(void) { if (can_use_virtual_dma) return request_irq(FLOPPY_IRQ, floppy_hardint, 0, "floppy", NULL); else return request_irq(FLOPPY_IRQ, floppy_interrupt, 0, "floppy", NULL); } static int vdma_dma_setup(char *addr, unsigned long size, int mode, int io) { doing_vdma = 1; virtual_dma_port = io; virtual_dma_mode = (mode == DMA_MODE_WRITE); virtual_dma_addr = addr; virtual_dma_count = size; virtual_dma_residue = 0; return 0; } static int hard_dma_setup(char *addr, unsigned long size, int mode, int io) { static unsigned long prev_size; static dma_addr_t bus_addr = 0; static char *prev_addr; static int prev_dir; int dir; doing_vdma = 0; dir = (mode == DMA_MODE_READ) ? PCI_DMA_FROMDEVICE : PCI_DMA_TODEVICE; if (bus_addr && (addr != prev_addr || size != prev_size || dir != prev_dir)) { /* different from last time -- unmap prev */ pci_unmap_single(isa_bridge_pcidev, bus_addr, prev_size, prev_dir); bus_addr = 0; } if (!bus_addr) /* need to map it */ bus_addr = pci_map_single(isa_bridge_pcidev, addr, size, dir); /* remember this one as prev */ prev_addr = addr; prev_size = size; prev_dir = dir; fd_clear_dma_ff(); fd_cacheflush(addr, size); fd_set_dma_mode(mode); set_dma_addr(FLOPPY_DMA, bus_addr); fd_set_dma_count(size); virtual_dma_port = io; fd_enable_dma(); return 0; } static struct fd_dma_ops real_dma_ops = { ._disable_dma = disable_dma, ._free_dma = free_dma, ._get_dma_residue = get_dma_residue, ._dma_setup = hard_dma_setup }; static struct fd_dma_ops virt_dma_ops = { ._disable_dma = vdma_disable_dma, ._free_dma = vdma_nop, ._get_dma_residue = vdma_get_dma_residue, ._dma_setup = vdma_dma_setup }; static int fd_request_dma(void) { if (can_use_virtual_dma & 1) { fd_ops = &virt_dma_ops; return 0; } else { fd_ops = &real_dma_ops; return request_dma(FLOPPY_DMA, "floppy"); } } static int FDC1 = 0x3f0; static int FDC2 = -1; /* * Again, the CMOS information not available */ #define FLOPPY0_TYPE 6 #define FLOPPY1_TYPE 0 #define N_FDC 2 /* Don't change this! */ #define N_DRIVE 8 /* * The PowerPC has no problems with floppy DMA crossing 64k borders. */ #define CROSS_64KB(a,s) (0) #define EXTRA_FLOPPY_PARAMS #endif /* __KERNEL__ */ #endif /* __ASM_POWERPC_FLOPPY_H */ |